Which of these mechanisms exerts gene control by suppressing transcription in eukaryotes?

A. Acetylation of histone proteins
B. Methylation of DNA
C. Action of activator proteins

Answers

Answer 1
Sets of transcription factor proteins buying a specific DNA sequences in or near a gene and promote or repress its transcription into RNA. Which i believe its C
Answer 2

Answer:

Its B. Methylation of DNA I just took the test.

Explanation:


Related Questions

Human protein X is encoded by human gene X. Gene X consists of 4 exons of 200 bp each, interspersed with introns of 1,000 bp each.
An mRNA cap will be found on ____________.
a. the primary transcript
b. the mRNA
c. at least one of the lariats
d. the poly(A) tail.
e. exon 1
f. all exons
g. some introns

Answers

Answer:

a. the primary transcript

Explanation:

The first step in RNAm maturation is the modification of the 5' end of the transcript via the addition of a structure called a cap or 7-methyl guanosine cap. The enzymes responsible for the formation of this cap are recruited to the phosphorylated C-terminal domain after the addition of the first twenty to thirty nucleotides of ARN. The formation of the cap is started by the addition of a GTP molecule oriented inversely to the 5' end nucleotide on RNA. Then methyl groups are added to this G residue and to the ribose forms of one or two nucleotides located on the 5' end. All these reactions take place in the nucleus when the mRNA is found as a primary transcript.

Which of the following microscope require that specimens be non-living in order to be observed

Answers

Answer:

Transmission Electron Microscope

Explanation:

This Transmission Electron Microscope (TEM) is primarily used to view specimens of organisms through a projection image.

It is used to view non-living specimens, even though its not as advanced as its newer counterparts.


Cell _________
is the process by
which cells divide

Answers

Answer:

Cell cycle

Explanation:

Mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell devides to produce two identical daughter cells.

Give 4 examples of types of specialized cells.

Answers

Nerve cells, Blood cells, Reproductive cells, Skin cells

One goal of scientists is to assign every organism a universally accepted name according to the system known as

Answers

Answer:

Binomial Nomenclature

Explanation:

Karl Line is the creator of the binomial nomenclature, which leads to uniqueness in naming plants and categorizing plants into classes, orders, genders, and species.

Binomial nomenclature in biology denotes the official method of naming species. As the word itself suggests, the scientific name is formed by a combination of two expressions: the name of a genus and a species.

4. When an offspring grows off from the body of a parent organism it is called __________________. *

a.fission
b.budding
c.fragmentation
d.sporulatioin

Answers

Answer:

Budding

Explanation:

It is asexual reproduction in which offspring grows out of the parents organisms.

In the process of budding, an offspring grows off from the body of a parent organism and buds off when fully matured. Thus, the correct option is B.

What is Asexual Reproduction?

Asexual reproduction is the type of reproduction only a single parent is involved. In this process, offspring are developed from a single parent called mother cell and these offspring are genetically identical to the parent hence are also called as clones.

During the process of budding which is a types of asexual reproduction, a new organism develops from an outgrowth or bud which is formed on the parent plant due to the cell division at a particular site on the parent plant. For example, the small bulb-like projections coming out from the yeast cell are the buds which give rise to new yeast organism.

 

Therefore, the correct option is B.

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In Indiana Jones, what is a different between Classical Archaeology and Processual Archaeology?

Write 2 sentences please.

Answers

Answer:

John S. ... “It was stated above that traditional archaeology is concerned with the reconstruction of ancient cultural systems while the 'new archaeologist' looks for explanations of cultural change that can be used to predict particular changes in particular situations” (Justeson 131).

Villi in small intestine helps to increase area of absorption for minerals and nutrients.

True
False

Answers

I think it’s true correct me if I’m wrong .

Answer:true

Explanation:The function of the plicae circulares, the villi, and the microvilli is to increase the amount of surface area available for the absorption of nutrients. Each villus transports nutrients to a network of capillaries and fine lymphatic vessels called lacteals close to its surface.

Genetic counselors work mostly with
1 school counselors.
2 researchers in genetic engineering.
3 elderly adults who live in care facilities.
4 couples who are planning to have children.

Answers

Answer: couples who are having children

Explanation:

I got it right on my quiz

Does the resulting wave demonstrate destructive
interference? Explain your answer.

Answers

Answer:

Destructive interference happens when one wave is oscillating the opposite way as the other one, so it compensates.

Explanation:

Answer:does not demonstrate destructive interference,

Explanation:

What values or parameters can you adjust in this computer model?

Answers

Hi, you've asked an incomplete question. However, I provided some information about what a computer model does.

Explanation:

Remember, a computer model in simple terms is a representation of a real-life process or system using a computer. In other words, the computer model is a virtual representation of reality.

For example, weather forecasters often make use of computer models in other to predict changes in weather by taking note of certain values or parameters.

Answer:

You can adjust the type of fluid used, the amount of the fluid, and the amount of water.

Explanation:

PLATO

the zipper like mountain ranges the run across the flor of the ocean are called ??

Answers

Answer:

answer is mid ocean ridges

Answer:

Undersea mountain ranges are mountain ranges that are mostly or entirely underwater, and specifically under the surface of an ocean. If originated from current tectonic forces, they are often referred to as a mid-ocean ridge. In contrast, if formed by past above-water volcanism, they are known as a seamount chain

I am a microorganism that helps to increase soil fertility naturally.

Ribosomes
Rhizobium
Leguminous plants

Answers

Answer: rhizobium

Explanation: Some bacteria like rhizobium and blue green algae are able to fix nitrogen gas from the atmosphere to enrich the soil with nitrogen compounds and increase its fertility.

a balloon expands and shrinks. which type of cell does the balloon best model? a. guard cell, b. bone cell, c. nerve cell, d. epithelial cell

Answers

Answer:

Guard Cell

Explanation:

Answer:

The Answer is Guard Cell

PLEASE HELP ME WITH THIS QUESTION

Answers

Answer:golgi apparatus

Explanation:

The Golgi apparatus is the correct answer

pls help me answer this

Answers

Answer:

Hypertonic:) u welcome

Explanation:

Answer:

I would probably say #4 All the previous could cause this

How does the phrase
division of labor relate to differentiation?

Answers

It relates because whither separate a long fast into more manageable steps.

help

someone that knows it

Answers

Answer:

According to the image, the approximate QT interval is 0.4 seconds.

Explanation:

The QT interval is the space between the beginning of the QRS complex and the end of the T wave, which represents from the beginning of depolarization to ventricular repolarization.

Considering that the extandardized measurements of an EKG, where the paper circulates at a speed of 25 mm/s, 1 mm horizontal —measuring time— has an equivalence of 0.04 s.

In the image, there is 10 mm between the beginning of the QRS and the end of the T wave, so:

    0.04 seconds X 10 mm = 0.4 seconds.

Then, the estimated QT interval is 0.4 seconds.

Describe limits to cell division.

Answers

Answer:

All cells in the body have this internal control and most cells only divide between 50-70 times before they stop or die.

The study of cells is called cell biology.

The cell theory is given by Rudolf Virchow

The postulates of a cell theory are as follows:-

All the organism is made up of cellThe structure and the functional unit of life is the cell.All the pre-existing cell is made up of old cell.

The limits of the cell division are cancer cells. The cancer cell does not stop after a limit. It divides continuously and forms a tumor.

Hence, the correct answer is a cancer cell.

For more information, refer to the link:-

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How are cancerous cells different from normal cells?

Answers

Answer:

Cancer cells differ from normal cells in many ways that allow them to grow out of control and become invasive. One important difference is that cancer cells are less specialized than normal cells. That is, whereas normal cells mature into very distinct cell types with specific functions, cancer cells do not.

Explanation:

Hope this helps ya!!

Least specialized cells to most specialized cells

Answers

Answer:

1)  Zygote cell

2) Blastocyst cells

3) Mesoderm cells

4) Heart Cells

Hopefully, it helps. :)

Which of the following statements is best demonstrated by the model?

Answers

Answer:

i think d is correct

Explanation:

Answer:

i think d is correct ‍♀️

What is the meaning of life ?​

Answers

Answer:

The actual meaning of life is to fulfill your purpose in life and accomplish your goals. What I mean by this is, everyone has a purpose, of why they are living. None of us will be here if we all didn't have a purpose

Explanation:

Which statement describes competition in an environment? Organisms share a place to sleep. A living thing consumes berries on a tree. Sunlight shines only three months out of the year. A stream supplies an abundance of water in a forest.

Answers

Answer:

Sunlight shines only three months out of the year.

Explanation:

I think this is right

Because abundance means a large amount so there would be no competition there.

If organisms share a place to sleep then that means no competition

If a living thing is consuming berries on a tree then the living thing is just eating

But if the sunlight only shines three months out of the year then that can cause a shortage of food in the environment causing for the living creatures in the environment to compete for the food that is left since there won't be enough to supply for and abundance of living things.

The statement that describes competition in an environment is option B a living thing consumes berries on a tree. Thus, consuming berries on a tree is reducing the availability of the food for other livings depends on the berries.

What is survival of living things?

In the nature, the concept that survival of the fittest domintates. The organisms which are fit physically and are smart to gather food will survive in the nature otherwise they will extincts.

An ecological community is a collection of populations of at least two distinct species that interact both directly and indirectly in a specific geographic area. Within this community, diffrent organisms can be found .

Numerous ecological characteristics and functions, including nutrient cycling and food webs, are based on interactions between species. Depending on the evolutionary context and environmental factors that they take place in, these interactions can have a variety of different natures.

Because of this, ecological interactions between particular individuals and entire species are frequently difficult to identify and quantify and depend on their scale and context they face extinction. Hence, option B is correct.

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How might a plant cell compensate for the excessive membrane fluidity that occurs during prolonged exposures to elevated temperature?A) Reduce membrane cholesterol content.B) Alter the lipid composition to have longer fatty acyl tails and fewer double bonds.C) Alter the lipid composition to have shorter fatty acyl tails and more double bonds.D) Alter the lipid composition to have shorter and more unsaturated fatty acyl tails.E) Reduce cholesterol content and alter the lipid composition to have shorter fatty acyl tails.

Answers

Answer:

E) Reduce cholesterol content and alter the lipid composition to have shorter fatty acyl tails.

Explanation:

Reducing the amount of fat makes the tissues or membranes have less plasticity, since these fatty acids with high temperatures increase their fluidity, are less dense and give greater plasticity in their elastic modulus.

What is the purpose of the Terra satellite? O A. To monitor conditions on Earth B. To identify near-Earth objects C. To search for planets in other solar systems D. To observe the movement of the moon


n e w a. p. e. x. 2020​

Answers

Answer:

to monitor conditions on earth

Explanation:

To monitor conditions on Earth is the purpose of the Terra satellite. Therefore, the correct option is option A.

An artificial object that is purposefully placed into orbit around a celestial body, most frequently the Earth, is referred to as a satellite. It can be either manned or unmanned, and depending on how it is made and how it works, its purpose can be very different. Satellites have revolutionised many elements of our daily lives and have become essential parts of modern technology. Satellites come in a variety of varieties, each with a special function. Long-distance communication is made possible, for instance, by communication satellites that transfer signals between ground stations. To monitor conditions on Earth is the purpose of the Terra satellite.

Therefore, the correct option is option A.

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SOMEONE PLZ HELP!!!!!!!!!!!

Answers

Answer:

B

Explanation:

it was a question I had last week on my test.

Answer:

endoplasmic reticulum (ER)

Explanation:

PLEASE HELP ME WITH THIS QUESTION

Answers

the answer is the smooth endoplasmic reticulum

please help!!!!!!!!!!!!!!! almost due!!!!!!
4. *A simple circuit is created with one pathway, one battery, one light bulb, and one switch. Why does the bulb go out when you open the switch?
a. Because the battery-dies.
b. Because opening the switch opens the circuit.
c. Because too much electricity flows through the bulb:
d. Because there is too much voltage

please explain why you pick the answer​

Answers

c.


and yes it a the right answer i checked everything double checked and it absolutely right

What is a feedback mechanism?

Answers

Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop. The system can then be said to feed back into itself
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